In the initial surgery, Doctor Génessier makes cuts around the face and eyes of the young woman (Edna). When he and Louise remove the face, there suddenly are marks and a hole cut around the mouth.
At the beginning, when the body is being dragged to the water when it is first removed from the car, the corpse is wearing stockings. When the corpse is dragged closer to the water, the legs are bare.
When the doctor parks in front of the morgue, his front wheels are turned left from backing up to the curve. In the next cut, when he leaves the car, the front wheels are straight.
There are actually two different Citroen DS cars used in the film as the Doctor's car. One, presumably a DS21, has two spotlights built into the bodywork by the headlights and chrome trim, including a driver's wing-mirror. [(at around 10 mins) as he arrives with no lights and as he leaves a few minutes later using headlights and spotlights, another continuity gaff in itself.) (at around 12 mins) and a couple minutes late, the DS with spotlights is seen, but a few minutes later it has changed to one with no spotlights and no wing-mirror (presumably a DS19). Though its front plate is "7769-GR75", when the Doctor puts it in the garage, the rear plate reads "2923-GR75", and the assistant's Citroen Diane has the plate "7769-GR75" on the front. (at around 32 mins) The Diane has "2923-GY75" on the rear and then the same on the front, which was its registration when first seen near the start. Finally, (at around 54 mins) it's back to the DS with spotlights.
The pupils of a dead body are wide, but Edna's are contracted.
Being rendered unconscious by ether or chloroform takes much longer than is shown in this film, and its effects last much shorter as well.
When the doctor is preparing for surgery, he breaks sterility by tying his mask. The unsterile mask should be put on before scrubbing his hands and applying sterile gloves. The theory of sterility is to prevent infection by minimize touch to any surface besides those already sterilized.
There is no reason to presume the mask itself was not sterile. It already was on the doctor, laying against his smock; he touched its ties with gloved hands, and his assistant (Louise) tied it behind his head. During the Covid pandemic, some hospitals sterilized surgeons' masks for reuse.
There is no reason to presume the mask itself was not sterile. It already was on the doctor, laying against his smock; he touched its ties with gloved hands, and his assistant (Louise) tied it behind his head. During the Covid pandemic, some hospitals sterilized surgeons' masks for reuse.
When she's not wearing it, Christiane's mask is very thick and heavy and would only seem to cover her face. When she puts it on, however, it is very thin, close-fitting, and seamlessly covers her jawline and the underside of her chin, revealing that the mask itself is a prop while the actress probably wears a combination of makeup and prosthetics.
Through the openings of Edna's bandage there are no signs of a surgery. She's even wearing makeup and lipstick.
Christiane's face was severely burned in a traffic accident, but there are no scars on her cheeks, ears, neck, or hands.
When Louise notices a passing airplane, the audio is that of a piston-engined propeller-driven plane, but the airplane shown flying overhead is a jet; its two engines are tail-mounted to the fuselage so would not have the clearance required by propellers.
(at around 35 mins) Dr. Génessier is carrying an unconscious Edna Grüber out of a room. Just as they're exiting the door, a crew member's head can be seen to move in the bottom left corner of the frame.
Christiane says that her father has removed all the mirrors from the house. But when the doctor carries an unconscious Edna out of the parlor, their reflections can be seen in a mirror beside the fireplace.